What do you get when you export Islam (according to Muhammad) from Arabia into the animistic religious society of Indonesia? Answer: The most highly populated Muslim population in the world, where most of the Muslims are nominal.
However, the most northwestern area of Indonesia is where you'll find Sharia implemented much more strictly than in the rest of the nominal country. This video will give you a look of what life is like in Aceh where, not surprisingly, it's common to find people who support ISIS, and believe that Middle Eastern countries are the ones who correctly enforce Sharia.